Cancer doesnt respect bravery... and McCain should not be forced to feel he didnt fight hard enough. Hes got an aggressive fast moving cancer - possible caused by cell phone use. He doesnt need to carry the burden of letting down people who believe in him. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3226506/ Risks after Prolonged and Heavy Mobile Phone Use If exposure to RF fields through mobile phone use were tumorigenic, people using mobile phones longest and those who were the heaviest users would be expected to show the highest risks of brain tumors.
Skipping to the conclusion of this article....
Conclusions: Although there remains some uncertainty, the trend in the accumulating evidence is increasingly against the hypothesis that mobile phone use can cause brain tumors in adults.